廈門泰尼電氣有限公司
主營(yíng)產(chǎn)品: AB模塊PLC |
廈門泰尼電氣有限公司
主營(yíng)產(chǎn)品: AB模塊PLC |
參考價(jià) | 面議 |
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更新時(shí)間:2018-03-30 09:57:14瀏覽次數(shù):330
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C832-001-T C832-001-T
C832-001-T C832-001-T
電路的工作過程:
a> 開關(guān)S開通后,變壓器繞組N1兩端的電壓為上正下負(fù),與其耦合的N2繞組兩端的電壓也是上正下負(fù).因此VD1處于通態(tài),VD2為斷態(tài),電感L的電流逐漸增長(zhǎng);
b> S關(guān)斷后,電感L通過VD2續(xù)流,VD1關(guān)斷.S關(guān)斷后變壓器的激磁電流經(jīng)N3繞組和VD3流回電源,所以S關(guān)斷后承受電壓.
c> 變壓器的磁心復(fù)位:開關(guān)S開通后,變壓器的激磁電流由零開始,隨著時(shí)間的增加而線性的增長(zhǎng),直到S關(guān)斷.為防止變壓器的激磁電感飽和,必須設(shè)法使激磁電流在S關(guān)斷后到下一次再開通的一段時(shí)間內(nèi)降回零,這一過程稱為變壓器的磁心復(fù)位.
正激電路的理想化波形:
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